Keyboard instrument

Details Keyboard instrument Keyboard instrument

1989-06-15

1991-07-16

Perkey, W. B.

Music

Instruments

Electrical musical tone generation

84718, 181141, 381118, 381159, 381 96, G10H 326, H04R 300

Patent

active

050315005

ABSTRACT:
Keyboard instruments incorporating sound systems for generating musical tones are disclosed. In a first keyboard instrument, speakers are mounted near a keyboard, and are arranged upright to be directed to the keyboard on the front side, thereby allowing a performer to clearly grasp the sound quality of performance tones. In a second keyboard instrument, which comprises a Helmholtz resonator consisting of a resonance port and a cabinet, an electro-acoustic transducer mounted on the outer surface of the cabinet and a driver for driving the transducer so as to cancel an air counteraction from the resonator, the size of a sound system is reduced, and the frequency characteristics, especially the low-frequency reproduction characteristics of the sound system are improved.

REFERENCES:
patent: 1953544 (1934-04-01), Stein
patent: 3064515 (1962-11-01), Markowitz
patent: 3410947 (1968-12-01), Behnke et al.
patent: 3506773 (1970-04-01), George
patent: 3643000 (1972-02-01), Andersen
patent: 3718747 (1973-02-01), Martin et al.
patent: 4365113 (1982-12-01), Soma et al.
patent: 4741040 (1988-04-01), Kaizer

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